Grate



No. 610,674. Y Patented sept! I3, |898. w. EDGAR.

GRATE.

[Application led Jan. 29, 1898.)

(No Model.)

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IVILLIAM EDGAR, OF MOBILE, ALABAMA.

GRATE.

SPECIFICATION forming part of Letters Patent No. 610,674, cla-tedSeptember 13, 1898.

Application tiled January 29, 1898. Serial No. 668,448. (No model.)

Zh a/ZZ whom it may concern.-

Be it known that I, VILLIAM EDGAR, of Mobile, in the county of Mobileand State of Alabama, have invented a new and useful Improvement inGrates, of which the following is a speciiication.

This invention relatesto improvements in grates, and has forits objectto provide a grate especially adapted for burning sawdust, and in whichthe top plates are so connected to the supporting-ribs that an efficientdraft is obtained and at the same time warping or breaking of the platesin expansion and contraction is practically prevented.

My invention consists principally in form-. ing the top plate with aseries of circular openings in close ,proximity to each other, eachopening having its walls extended above the main top surface of theplate, whereby is formed an annular conical ring or projection aroundeach opening, so as to prevent the sawdust running through the same.

The invention further consists in mounting the top plate upon a weborsupporting-rib form ed of two longitudinal bars intersected or crossedat predetermined intervals by transverse bars, the rectangular framethus formed having upward projections at certain points and to which thetop plate is directlyconnected, 'all of which will be fully described,and the novel features thereof particularly pointed out in the appendedclaims.

Reference is to be had to the accompanying drawings, forming part ofthis specification, and in which like characters of reference indicatecorresponding parts in al1 the figures.

Figure l is a top plan view of my improved grate, part of the top platebeing broken away to show the supporting-web. Fig. 2 is a longitudinalsection on the line 2 2, Fig. 1. Fig. 3 is a view of the web with theplate removed; and Fig. 4L is a transverse vertical section on the line4 4, Fig. l.

Referring to the drawings, A represents the top plate of the grate,formed with a number of vertically-disposed openings B, the uppersurface of the plate being raised around each opening to form acone-shaped annular projection C. These annular projections I have foundessential for the purpose of preventing the sawdust or other pulverulentfuel, for which my grate is especially designed, from running throughthe draft-openings B. To support this top plate A in as advantageous amanner as possible, I form the supporting rib or web D in the form of arectangular framework-that is, with longitudinally-extending bars E andcross-bars F-and the said bars are connected to and support the topplate by means of upwardly-extending shoulders H. These shoulders orextensions H occur at the points of intersection of the cross-bars withthe horizontal bars. By this construction, as

best seen in Figs. 2 and 4, spaces are left at.

intervals between the top plate and supportin g-web for the freecirculation of air through the draft-openings B and around the plate Ato the fuel, and at the same time the strength of the top plate is notaffected.

In order to prevent the side edges of the top plate, which extend beyondthe longitudinal bars E, from sagging down when heated,I provide sidebrackets J, which are connected to the bars E and the overhanging edgesof the top plate, as at G, a space being left open between said bars andbrackets.

It will be seen that by this construction of the top plate and itssupporting-web warping and sagging of the top plate are prevented andthe bar has a minimum of weight,with a great degree of strength.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. In a grate, a rectangular supporting rib or web consisting of twolongitudinal bars E and a plurality of transverse bars F, shoulders Hextending upwardly from said bars at their points of intersection, andside brackets .I formed on the outer side of each longitudinal bar E andcontiguous to the ends of each transverse bar F, each side brackethaving a shoulder extending upwardly the same distance as the shouldersH, all of which shoulders are adapted to engage and support the topplate of the grate, whereby spaces are provided between said top plateand supporting-web for the free circulation of air, and whereby at thesame time sagging of the top plate is prevented, as and for the purposeset forth.

2. Agrate, consisting of a top plate formed with a series of openings, asupporting rib or web formed of two longitudinal bars and a IOOplurality of transverse bars, said Web having its upper edge with ashoulder engaging the shoulders extending from its upper edge atoverhanging side edge of the top plate, as and 1o the intersections ofthe bars and on which for the purpose set forth.

the top plate rests with its edges overhanging the longitudinal bars andside brackets WILLIAM EDGAR' formed on the outer sides of the longitudi-Witnesses: nal bars and contiguous to the transverse FIELDING VAUGHAN,

bars, eaoh of said brackets being formed on M. E. THOMSON.

